Control device, elevator and control method

Abstract

The application discloses a control device, an elevator and a control method. The control device is used for the elevator, the elevator comprises a brake power supply and a brake, the brake power supply is electrically connected with the brake and is used for supplying power to the brake, the control device comprises a first control module, the first control module comprises a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series on a circuit of the brake power supply and the brake, the first controller is electrically connected with the first power relay and the second power relay respectively, and the first controller is configured to control the brake power supply to supply power to the brake according to on-off states of the first power relay and the second power relay. Since the power relay can bear larger current and voltage, the high-power circuit can be controlled by arranging the power relay between the brake power supply and the brake, the use range is improved, and the power relay is cheaper than the safety relay, so that the cost can be saved.

Description

Technical Field

[0001] This application relates to the field of elevator control technology, and more specifically, to a control device, an elevator, and a control method. Background Technology

[0002] In related technologies, vertical lifting equipment such as elevators and freight elevators are braked by a brake. However, this braking method requires multiple brake contactors. The braking and release states of the brake are controlled by connecting and disconnecting multiple brake contactors, resulting in a long response time for the brake.

[0003] Currently, the braking system can be modified to use the contacts of a safety relay as a control switch for the AC input voltage of the brake power supply, thus reducing the brake's response time. However, safety relays can only handle small currents (e.g., 3A), limiting their applicability and increasing their cost. Summary of the Invention

[0004] This application provides a control device, an elevator, and a control method.

[0005] One embodiment of the control device of this application is used for an elevator, the elevator including a brake power supply and a brake, the brake power supply being electrically connected to the brake for supplying power to the brake, the control device including a first control module, the first control module including a first controller, a first power relay and a second power relay, the first power relay and the second power relay being connected in series in the circuit of the brake power supply and the brake, the first controller being electrically connected to the first power relay and the second power relay respectively, the first controller being configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

[0006] Another embodiment of the elevator according to this application includes a car, a brake, and a control device, wherein the control device is used for the elevator, the elevator includes a brake power supply and a brake, the brake power supply is electrically connected to the brake and is used to supply power to the brake, the control device includes a first control module, the first control module includes a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series in the circuit of the brake power supply and the brake, the first controller is electrically connected to the first power relay and the second power relay respectively, and the first controller is configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

[0007] One embodiment of this application describes a control method applied to an elevator, which includes a brake power supply, a brake, and a control device. The brake is used to brake the car. The control device includes a first control module, which includes a first power relay and a second power relay. The first power relay and the second power relay are connected in series in the circuit between the brake power supply and the brake. The control method includes acquiring the on / off states of the first power relay and the second power relay; and controlling the brake power supply to supply power to the brake based on the on / off states.

[0008] The control device, elevator, and control method of this application include a first control module. The first control module includes a first controller, a first power relay, and a second power relay. The first and second power relays are connected in series in the circuit between the brake power supply and the brake, so that the power supply from the brake power supply to the brake is determined by the on / off states of the first and second power relays. The first controller can be electrically connected to both the first and second power relays, thereby acquiring their on / off states and controlling the brake power supply to the brake based on these states. Since power relays can withstand larger currents and voltages, by placing power relays between the brake power supply and the brake, high-power circuits can be controlled, increasing the scope of application. Furthermore, power relays are cheaper than safety relays, saving costs.

[0009] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0011] Figure 1 This is a scene diagram of an elevator according to some embodiments of this application;

[0012] Figure 2 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0013] Figure 3 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0014] Figure 4 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0015] Figure 5This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0016] Figure 6 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0017] Figure 7 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0018] Figure 8 This is a schematic diagram of the structure of the control device according to certain embodiments of this application;

[0019] Figure 9 This is a schematic diagram of the structure of the control device according to certain embodiments of this application.

[0020] Icon labels:

[0021] 1000, Elevator; 100, Control Equipment; 10, First Control Module; 11, First Controller; 12, First Power Relay; 121, First Contact; 122, Second Contact; 13, Second Power Relay; 131, Third Contact; 132, Fourth Contact; 14, Safety Circuit; 141, Fourth Switch; 15, First Switch; 16, Voltage Sampling Point; 17, Third Switch; 20, Second Control Module; 21, Optocoupler Isolation Circuit; 22, First Contact Status Monitoring Circuit; 23, Second Contact Status Monitoring Circuit; 24, Detection Power Supply; 25, Converter; 26, Second Switch; 27, Control Line; 28, Second Controller; 29, Driver; 30, Third Control Module; 200, Brake; 300, Car; 400, Holding Brake Power Supply. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0023] Currently, for vertical lifting equipment such as elevators and freight elevators, when the elevator car is carrying a certain percentage of the rated load and running downwards at the rated speed, the brake alone should be sufficient to stop the drive unit. Alternatively, in case of elevator malfunction, a braking mechanism is required, such as a holding brake. However, this braking method requires multiple holding brake contactors, and the braking and release states of the brake are controlled by the connection and disconnection of the holding brake contactors. However, the response time of the holding brake contactors is relatively long, resulting in untimely braking. By using the contacts of a safety relay as the control switch for the AC input voltage of the holding brake power supply to replace the holding brake contactor, the action response time of the brake can be reduced. However, the safety relay can only allow a small current to pass (such as 3A), which limits its applicability, and the cost of the safety relay is relatively high.

[0024] To address the aforementioned technical problems, this application provides a control device 100.

[0025] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of this application, a control device 100 is used for an elevator 1000. The elevator 1000 includes a brake power supply 400 and a brake 200. The brake power supply 400 is electrically connected to the brake 200 and is used to supply power to the brake 200. The control device 100 includes a first control module 10. The first control module 10 includes a first controller 11, a first power relay 12, and a second power relay 13. The first power relay 12 and the second power relay 13 are connected in series in the circuit of the brake power supply 400 and the brake 200. The first controller 11 is electrically connected to the first power relay 12 and the second power relay 13 respectively. The first controller 11 is configured to control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13.

[0026] The brake power supply 400 can be a power source provided by the mains power grid, used to provide voltage to the brake 200 of the elevator 1000 to control the starting and stopping of the brake 200. The brake 200 can be a bidirectional thrust elevator 1000 brake 200. When the brake 200 is energized, it generates a bidirectional electromagnetic thrust, causing the brake 200 to disengage from the car 300 of the elevator 1000. When the power is off, the electromagnetic force disappears, and under the pressure of an external brake spring, a de-energized friction brake 200 is formed. The brake 200 is used to brake the car 300 of the elevator 1000.

[0027] Specifically, the control device 100 includes a first control module 10, which can be used to control the brake 200 to brake in the event of a malfunction of the elevator 1000, or to control the elevator 1000 to rise, fall or stop when the elevator 1000 is running normally.

[0028] The first control module 10 includes a first controller 11, a first power relay 12, and a second power relay 13. The first controller 11 can be a microcontroller unit (MCU) of the elevator 1000, used as the main controller of the elevator 1000. For example, the first controller 11 can control the elevator 1000's ascent, descent, and stop.

[0029] The first power relay 12 and the second power relay 13 can be single-pole double-throw power relays. The first controller 11 can control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13. For example, the first power relay 12 can be a K6 power relay, and the second power relay 13 can be a K6.1 power relay. There can be multiple first power relays 12 and second power relays 13, which is not limited here. Multiple first power relays 12 and second power relays 13 can be connected in series.

[0030] The first power relay 12 and the second power relay 13 are connected in series in the circuit between the brake power supply 400 and the brake 200. That is, the current provided by the brake power supply 400 enters the brake 200 after passing through the first power relay 12 and the second power relay 13 in sequence. The first controller 11 can be connected to the first power relay 12 and the second power relay 13 respectively, so that the first controller 11 can obtain the on / off state of the first power relay 12 and the second power relay 13. Then, when both the first power relay 12 and the second power relay 13 are in the on state, the first controller 11 can control the brake power supply 400 to supply power to the brake 200. After receiving the current, the brake 200 is in the released state. It should be noted that the released state of the brake 200 means that the brake 200 does not brake, and the elevator 1000 can operate normally. When one of the first power relay 12 and the second power relay 13 is in the off state, the first controller 11 can prevent the brake power supply 400 from transmitting current to the brake 200 of the elevator 1000. At this time, the brake 200 is de-energized and in the braking state. The brake 200 will brake the elevator 1000, so that the elevator 1000 stops running.

[0031] Optionally, when the elevator 1000 needs to stop running, the first controller 11 notifies the brake power supply 400 to stop supplying power to the brake 200 via bus communication (e.g., bus communication can be UART protocol, SPI protocol and CAN protocol, etc.). This avoids the use of brake contactors to stop supplying power to the control line 27, avoids the problem of brake contactor contact arcing and reduces the noise generated by the brake contactor.

[0032] Thus, the first power relay 12 and the second power relay 13 are connected in series in the circuit between the brake power supply 400 and the brake 200, so the power supply from the brake power supply 400 to the brake 200 is determined by the on / off state of the first power relay 12 and the second power relay 13. The first controller 11 can be electrically connected to both the first power relay 12 and the second power relay 13, thereby obtaining their on / off states and controlling the brake power supply 400 to supply power to the brake 200 accordingly. Since power relays can withstand larger currents and voltages, by placing power relays between the brake power supply 400 and the brake 200, high-power circuits can be controlled, increasing the range of applications. Furthermore, power relays are cheaper than safety relays, saving costs.

[0033] Please see Figure 2 and Figure 3 In some embodiments, the first control module 10 further includes an optocoupler isolation circuit 21, a first contact status monitoring circuit 22, and a second contact status monitoring circuit 23; or, the control device 100 includes a second control module 20, which includes an optocoupler isolation circuit 21, a first contact status monitoring circuit 22, a second contact status monitoring circuit 23, and a detection power supply 24. The optocoupler isolation circuit 21 and the first contact status monitoring circuit 22 are connected in series, and the first power relay 12 is electrically connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22. The detection power supply 24 is used to supply power to the second power relay 13, and the second power relay 13 is electrically connected to the first controller 11 through the second contact status monitoring circuit 23.

[0034] Specifically, the control device 100 includes a second control module 20, which is used to control the brake 200 to be energized or de-energized. The second control module 20 can collect the on / off status of the first power relay 12 and the second power relay 13 and transmit the on / off status to the first controller 11.

[0035] The second control module 20 includes an optocoupler isolation circuit 21, a first contact status monitoring circuit 22, a second contact status monitoring circuit 23, and a detection power supply 24. The optocoupler isolation circuit 21 converts the input signal into an optical signal via a photoelectric converter 25, and then converts the optical signal into an output signal, thereby achieving electrical isolation between the input and output. The first contact status monitoring circuit 22 monitors the status of the contacts to determine whether the first power relay 12 is in normal operating condition. For example, in a relay circuit, the changes in the state of normally open and normally closed contacts reflect the circuit's on / off status. When the normally open contact is closed, it indicates that the circuit is energized; when the normally open contact is open, it indicates that the circuit is de-energized. The optocoupler isolation circuit 21 can be connected in series with the first power relay 12, and the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22 are also connected in series. Therefore, the optocoupler isolation circuit 21 can convert the high-voltage current of the 400-220V brake power supply into a low-voltage current that can power the first contact status monitoring circuit 22. The first power relay 12 is electrically connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22, so that the first controller 11 can receive the contact on / off status information sent by the first contact status monitoring circuit 22.

[0036] The detection power supply 24 can be used to supply power to the second power relay 13 when the first power relay 12 is in the off state and the brake power supply 400 cannot supply current to the second power relay 13. The second power relay 13 can be electrically connected to the first controller 11 through the second contact status monitoring circuit 23, so that when the detection power supply 24 supplies power to the second power relay 13, the second contact status monitoring circuit 23 can send the on / off status information of the second power relay 13 to the first controller 11.

[0037] In some implementations, such as Figure 2 and Figure 3As shown, the optocoupler isolation circuit 21, the first contact status monitoring circuit 22, and the second contact status monitoring circuit 23 can be installed in the first control module 10. The optocoupler isolation circuit 21 can be connected in series with the first power relay 12, and the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22 can also be connected in series. This allows the optocoupler isolation circuit 21 to convert the high-voltage current of the 400-220V brake power supply into a low-voltage current that can power the first contact status monitoring circuit 22. The first power relay 12 is electrically connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22, allowing the first controller 11 to receive the contact on / off status information sent by the first contact status monitoring circuit 22. The second power relay 13 is electrically connected to the first controller 11 through the second contact status monitoring circuit 23, allowing the second contact status monitoring circuit 23 to send the on / off status information of the second power relay 13 to the first controller 11 when the power supply 24 supplies power to the second power relay 13.

[0038] Thus, by setting the first contact status monitoring circuit 22 and the second contact status monitoring circuit 23, the on / off status information of the first power relay 12 and the second power relay 13 can be accurately obtained, thereby enabling the first controller 11 to control the brake 200 to brake or release in a timely manner.

[0039] Please see Figure 2 and Figure 3 In some embodiments, the first power relay 12 includes a first contact 121 and a second contact 122, and the first contact 121 and the second contact 122 are connected to the first controller 11 through an optocoupler isolation circuit 21 and a first contact status monitoring circuit 22.

[0040] The second power relay 13 includes a third contact 131 and a fourth contact 132. A detection power supply 24 is electrically connected to the third contact 131 and the fourth contact 132 to supply power to the third contact 131 and the fourth contact 132. The third contact 131 and the fourth contact 132 are connected to the first controller 11 through the second contact status monitoring circuit 23.

[0041] Specifically, the first power relay 12 includes a first contact 121 and a second contact 122. The first contact 121 can be a normally closed contact, and the second contact 122 can be a normally open contact. The first contact 121 and the second contact 122 can be connected to the first controller 11 through an optocoupler isolation circuit 21 and a first contact status monitoring circuit 22. Therefore, the first controller 11 can determine the on / off state of the first power relay 12 based on the on / off state of the first contact 121 and the second contact 122, and then control the brake power supply 400 to supply power to the brake 200 according to the on / off state.

[0042] The second power relay 13 includes a third contact 131 and a fourth contact 132. The third contact 131 can be a normally closed contact, and the fourth contact 132 can be a normally open contact. A detection power supply 24 can be electrically connected to the third contact 131 and the fourth contact 132 to supply power to them. The third contact 131 and the fourth contact 132 can be connected to the first controller 11 through a second contact status monitoring circuit 23. Therefore, the first controller 11 can determine the on / off state of the second power relay 13 based on the on / off state of the third contact 131 and the fourth contact 132, and then control the brake power supply 400 to supply power to the brake 200 based on the on / off state.

[0043] Thus, by setting the first contact status monitoring circuit 22 to detect the on / off status of the first contact 121 and the second contact 122, and setting the second contact status monitoring circuit 23 to detect the on / off status of the third contact 131 and the fourth contact 132, the on / off status information of the first power relay 12 and the second power relay 13 can be accurately obtained, so that the first controller 11 can control the brake 200 to brake or release in a timely manner.

[0044] Please see Figure 2 and Figure 3 In some embodiments, the second control module 20 includes a converter 25, which is electrically connected to the brake power supply 400 and is used to convert the AC power of the brake power supply 400 into DC power. The first power relay 12 and the second power relay 13 are located on the AC side of the converter 25 or the first power relay 12 and the second power relay 13 are located on the DC side of the converter 25.

[0045] Specifically, the second control module 20 also includes a converter 25, which can be a thermoelectric converter 25. The two ends of the converter 25 are respectively connected to the power supply of the elevator 1000 and the brake 200. When the power supply of the elevator 1000 is AC power, the AC power flowing through the converter 25 can be converted into DC power by the converter 25, and the converted DC power is transmitted to the brake 200 of the elevator 1000.

[0046] The first power relay 12 and the second power relay 13 can be configured on the AC side of the converter 25 or on the DC side of the converter 25. For example, the first contact 121 and the second contact 122 of the first power relay 12, and the third contact 131 and the fourth contact 132 of the second power relay 13 can be configured on the AC side of the converter 25; the first contact 121 and the second contact 122 of the first power relay 12, and the third contact 131 and the fourth contact 132 of the second power relay 13 can be configured on the DC side of the converter 25.

[0047] In some embodiments, the first power relay 12 and the second power relay 13 are connected to the AC side of the converter 25. When the elevator 1000 stops running, AC current flows through the first contact 121 of the first power relay 12. After passing through the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22, the monitoring signal level is high (or low). The first controller 11 detects that the first power relay 12 is in the off state and uses the off state for the electrical control logic of the elevator 1000. DC current flows through the third contact 131 of the second power relay 13, which is boosted by the detection power supply 24. After passing through the second contact status monitoring circuit 23, the monitoring signal level is high (or low). The first controller 11 detects that the second power relay 13 is in the off state and uses the off state for the electrical control logic of the elevator 1000.

[0048] In some embodiments, the first power relay 12 and the second power relay 13 are connected on the AC side of the converter 25. When the elevator 1000 starts running, after the second contact 122 of the first power relay 12 is connected, the monitoring signal level changes to a low level (or a high level) after passing through the optocoupler isolation circuit 21 and the contact status monitoring circuit. The first controller 11 monitors that the first power relay 12 is in the connected state and uses the connected state for the electrical control logic of the elevator 1000. AC current flows through the fourth contact 132 of the second power relay 13. After passing through the second contact status monitoring circuit 23, the monitoring signal level is low (or high). The first controller 11 monitors that the second power relay 13 is in the connected state and uses the connected state for the electrical control logic of the elevator 1000.

[0049] In some embodiments, the first power relay 12 and the second power relay 13 are connected to the DC side of the converter 25. When the elevator 1000 stops running, DC current flows through the first contact 121 of the first power relay 12. After passing through the optocoupler isolation circuit 21 and the first contact status monitoring circuit 22, the monitoring signal level is high (or low). The first controller 11 monitors that the first power relay 12 is in the off state and uses the off state for the electrical control logic of the elevator 1000. The third contact 131 of the second power relay 13 flows through the DC current increased by the detection power supply 24. After passing through the second contact status monitoring circuit 23, the monitoring signal level is high (or low). The first controller 11 monitors that the second power relay 13 is in the off state and uses the off state for the electrical control logic of the elevator 1000.

[0050] In some embodiments, the first power relay 12 and the second power relay 13 are connected to the DC side of the converter 25. When the elevator 1000 starts running, after the second contact 122 of the first power relay 12 is connected, the monitoring signal level changes to a low level (or a high level) after passing through the optocoupler isolation circuit 21 and the contact status monitoring circuit. The first controller 11 monitors that the first power relay 12 is in the connected state and uses the connected state for the electrical control logic of the elevator 1000. The fourth contact 132 of the second power relay 13 carries DC current. After passing through the second contact status monitoring circuit 23, the monitoring signal level is low (or high). The first controller 11 monitors that the second power relay 13 is in the connected state and uses the connected state for the electrical control logic of the elevator 1000.

[0051] Thus, by setting the first power relay 12 and the second power relay 13 on the AC side of the converter 25 or setting the first power relay 12 and the second power relay 13 on the DC side of the converter 25, various elevator 1000 structures can be applied, thus improving the application range of the first power relay 12 and the second power relay 13.

[0052] Please see Figure 2 and Figure 3 In some embodiments, the first control module 10 further includes a safety circuit 14 and a first switch 15. The safety circuit 14, the first switch 15, the first power relay 12, and the second power relay 13 are connected in series. The first controller 11 is connected to the first switch 15 and is configured to control the first switch 15 to be turned on or off. When the first switch 15 or the safety circuit 14 is turned off, the first power relay 12 and the second power relay 13 are turned off. When both the first switch 15 and the safety circuit 14 are turned on, the first power relay 12 and the second power relay 13 are turned on.

[0053] Specifically, the first control module 10 includes a safety circuit 14 and a first switching element 15. The safety circuit 14 can be a safety circuit installed in the elevator 1000. For example, the safety circuit can be a safety switch installed in each safety component of the elevator 1000, with the safety switches connected in series to control a safety relay. The first switching element 15 can be a logic control unit of the elevator 1000, such as the Q1 logic control unit, or it can be a diode or transistor, etc. The first switching element 15 can receive signals from the first controller 11 and control the conduction and disconnection of the first switching element 15 through the signals. For example, if the first switching element 15 is a diode, when the diode receives a low-level signal from the first controller 11, the diode is in a cutoff state, disconnecting the current in the circuit. Safety circuit 14, first switch 15, first power relay 12 and second power relay 13 are connected in series, so that when safety circuit 14 or first switch 15 is open, first power relay 12 and second power relay 13 are open, and when safety circuit 14 and first switch 15 are both on, first power relay 12 and second power relay 13 are on.

[0054] Optionally, when the elevator 1000 is in a standby, unused state, safety checks can be performed on the first power relay 12 and the second power relay 13. For example, when the clock reaches midnight, the first controller 11 controls the on / off state of the first switch 15 to energize and de-energize the first power relay 12 and the second power relay 13. The first controller 11 then monitors the braking status of the brake 200 to determine whether the first power relay 12 and the second power relay 13 are in a normal, controllable state. During the standby period of the elevator 1000, the first power relay 12 and the second power relay 13 are kept disconnected. Upon receiving a command to operate the elevator 1000, the first power relay 12 and the second power relay 13 are kept on, thereby improving the service life of the first power relay 12 and the second power relay 13 and enhancing the safety of the elevator 1000.

[0055] Thus, by controlling the on or off of the safety circuit 14, the first switch 15, the first power relay 12 and the second power relay 13 included in the first control module 10, it is possible to control the current output by the brake power supply 400 in the elevator 1000 to supply power to the brake 200 of the elevator 1000, and to reduce the noise in the control equipment 100 of the elevator 1000.

[0056] Please see Figure 4In some embodiments, the first controller 11 is connected to a preset voltage sampling point 16 in the first control module 10. When the safety circuit 14 is disconnected, the voltage of the voltage sampling point 16 is a first preset voltage; when the safety circuit 14 is on, the voltage of the voltage sampling point 16 is a second preset voltage, which is greater than the first preset voltage. The first controller 11 is configured to acquire the voltage of the voltage sampling point 16 and control the brake 200 to brake when the voltage of the voltage sampling point 16 is the first preset voltage.

[0057] Specifically, a voltage sampling point 16 is preset in the first control module 10. A device for collecting the voltage at the end of the safety circuit 14, such as a sampling chip or voltmeter, is installed at the voltage sampling point 16. The voltage sampling point 16 is located on the line between the safety circuit 14 and the first switch 15, or on the line between the first switch 15 and the second switch 26. The voltage sampling point 16 is connected to the first controller 11, allowing the first controller 11 to obtain the voltage at the end of the safety circuit 14 through the voltage sampling point 16. When the safety circuit 14 is open, the first controller 11 obtains the voltage at the sampling point as a first preset voltage. At this time, the first controller 11 can control the brake power supply 400 to stop supplying power to the brake 200 of the elevator 1000. When the safety circuit 14 is closed, the first controller 11 obtains the voltage at the sampling point as a second preset voltage, and the value of the second preset voltage is greater than the value of the first preset voltage. At this time, the first controller 11 can control the brake power supply 400 to supply power to the brake 200 of the elevator 1000.

[0058] Thus, the first controller 11 controls the brake power supply 400 to supply power to the brake 200 by detecting the voltage at the voltage sampling point 16. In the event that the safety circuit 14 is suddenly disconnected, the first controller 11 monitors the voltage at the end of the safety circuit 14 and stops the brake power supply 400 from supplying power to the brake 200 of the elevator 1000, thereby shortening the response time of the braking action of the brake 200 of the elevator 1000 and reducing the noise in the control equipment 100 of the elevator 1000.

[0059] Please refer to it again. Figure 2 and Figure 3 In some embodiments, the second control module 20 further includes a plurality of second switches 26 and a plurality of control lines 27. The plurality of control lines 27 are used to connect the brake power supply 400 and the brake 200. Each third switch 17 is located in each control line 27. The second switches 26 are configured to control the conduction or disconnection of the corresponding control line 27. The first controller 11 is configured to control the conduction or disconnection of the plurality of second switches 26.

[0060] Specifically, the second control module 20 includes a second switch 26 and multiple control lines 27. The multiple control lines 27 are used to connect the brake power supply 400 and the brake 200. The second switch 26 can be a diode, transistor, etc., and the number of second switches 26 can be multiple, which is not limited here. One or more second switches 26 are respectively set on each control line 27, and the second switches 26 are connected to the first controller 11. One or more second switches 26 can control the corresponding control line 27 to be turned on or off, and the first controller 11 can control one or more second switches 26 to be turned on or off, so that the first controller 11 controls the corresponding control line 27 to be turned on or off by controlling the second switches 26. For example, the number of second switches 26 is K1 and K2, respectively. The control line 27 corresponding to K1 is L1, and the control line 27 corresponding to K2 is L2. L1 supplies power to the brake 200 of the elevator 1000, and L2 supplies power to another brake 200 of the elevator 1000. When elevator 1000 performs a power detection on the brake 200 of elevator 1000, the second switch 26K1 is turned on and the second switch 26K2 is turned off. The control circuit 27L1 provides current to the brake 200, thus obtaining the braking status of the brake 200 of elevator 1000 on elevator 1000. When elevator 1000 performs a power detection on the brake 200 of elevator 1000, the second switch 26K2 is turned on and the second switch 26K1 is turned off. The control circuit 27L2 provides current to the brake 200, thus obtaining the braking status of the brake 200 of elevator 1000 on elevator 1000.

[0061] Thus, the first controller 11 controls the corresponding control line 27 to be turned on or off by controlling one or more second switches 26, avoiding the use of the first power relay 12 and the second power relay 13 to control the on and off of multiple control lines 27 when the elevator 1000 is in a light load state. This can improve the service life of the first power relay 12 and the second power relay 13 and reduce the noise in the elevator 1000 control equipment 100.

[0062] Please see Figure 5 In some embodiments, the second control module 20 further includes a second controller 28, and a plurality of second switches 26 are connected to the first controller 11 through the second controller 28. The second controller 28 is configured to control the plurality of second switches 26 to be turned on or off upon receiving a first control signal from the first controller 11.

[0063] Specifically, the second control module 20 includes a second controller 28, which can be another microcontroller unit of the elevator 1000, and there can be multiple controllers, which is not limited here. The second controller 28 can connect to one or more second switches 26 and is connected to the first controller 11, so that the first controller 11 is connected to one or more second switches 26 through the second controller 28. When the second controller 28 receives a first control signal from the first controller 11, it controls one or more second switches 26 to be turned on or off.

[0064] Optionally, the second controller 28 can continuously communicate with the first controller 11. At this time, one or more second switches 26 are in the on state. When the second controller 28 does not receive communication information from the first controller 11, the second controller 28 can control one or more second switches 26 to be disconnected.

[0065] Thus, the second controller 28 controls one or more second switches 26 to be turned on or off by receiving the first control signal from the first controller 11. In the event that the first controller 11 fails to control the multiple control lines 27 to be turned on or off, the second controller 28 can complete the connection and disconnection of the elevator 1000 to the multiple control lines 27, thereby shortening the response time of the braking action of the elevator 1000 brake 200 and improving the safety of the elevator 1000 operation.

[0066] Please refer to it again. Figure 2 and Figure 3 In some embodiments, a plurality of second switches 26 are connected to a preset voltage sampling point 16 in the first control module 10. When the voltage at the voltage sampling point 16 is a first preset voltage, one or more of the plurality of second switches 26 are disconnected; when the voltage at the voltage sampling point 16 is a second preset voltage, one or more of the plurality of second switches 26 are turned on, and the second preset voltage is greater than the first preset voltage.

[0067] Specifically, one or more second switches 26 can be connected to a preset voltage sampling point 16 in the first control module 10. When the second switch 26 obtains a voltage at the voltage sampling point 16 that is a first preset voltage, one or more second switches 26 will be disconnected, and one or more control lines 27 will be disconnected, thereby cutting off the DC output of the control line 27 corresponding to the converter 25, and the converter 25 stops supplying power to the brake 200 of the elevator 1000; when the second switch 26 obtains a voltage at the voltage sampling point 16 that is a second preset voltage, one or more second switches 26 will be turned on, and one or more control lines 27 will be turned on, so that the converter 25 can output DC power through the corresponding control line 27 to supply power to the brake 200 of the elevator 1000. For example, the second switch 26 can be a diode. When the diode receives a low level at voltage sampling point 16, the diode is in the off state, and the brake 200 starts to brake the elevator 1000. When the diode receives a high level at voltage sampling point 16, the diode is in the on state, and the brake 200 starts to release the elevator 1000.

[0068] Thus, by detecting the voltage at the voltage sampling point 16, the second switch 26 is controlled to turn on and off, thereby controlling the corresponding control line 27 to turn on and off. In the event that the safety circuit 14 is suddenly disconnected, the second switch 26 monitors the voltage at the end of the safety circuit 14 and stops multiple control lines 27 from supplying power to the brake 200 of the elevator 1000, thereby shortening the response time of the brake 200 of the elevator 1000.

[0069] Please see Figure 6 In some embodiments, the second control module 20 includes a driver 29 connected to a plurality of second switches 26, and the driver 29 is configured to control one or more of the plurality of second switches 26 to be turned on or off.

[0070] Specifically, the second control module 20 includes a driver 29, which can be a reverse driver 29. The driver 29 is connected to one or more second switches 26, and the driver 29 is able to control one or more second switches 26 to be turned on or off, thereby controlling the converter 25 to supply power to the elevator 1000 brake 200.

[0071] Thus, by controlling one or more second switches 26 to be turned on or off by the driver 29, it is possible to avoid using the second switches 26 to control the on / off state of multiple control lines 27 when the elevator 1000 is in a light-load state, thereby improving the service life of the second switches 26.

[0072] Please see Figure 7The driver 29 is connected to both the preset voltage sampling point 16 of the first control module 10 and the first controller 11. The driver 29 is configured to control one or more of the plurality of second switches 26 to be turned on or off according to the first control signal of the first controller 11 and / or the voltage of the voltage sampling point 16.

[0073] Specifically, the driver 29 in the second control module 20 can be connected to the voltage sampling point 16 and the first controller 11 in the first control module 10, respectively. The driver 29 can receive the first control signal from the first controller 11 and the voltage of the voltage sampling point 16. Thus, the driver 29 can control one or more of the multiple second switches 26 to be turned on or off according to the first control signal from the first controller 11 and the voltage of the voltage sampling point 16. For example, the driver 29 can be connected to the voltage sampling point 16 and the first controller 11 through an AND gate logic connection. When the driver 29 receives a second preset voltage from the voltage sampling point 16 and the first control signal indicating that it is turned on, the driver 29 can control one or more second switches 26 to be turned on. When the driver 29 receives a first control signal indicating that it is not turned on or the voltage of the voltage sampling point 16 is the first preset voltage, the driver 29 can control one or more second switches 26 to be turned off.

[0074] Thus, by configuring the driver 29 to control one or more of the plurality of second switches 26 to be turned on or off according to the first control signal of the first controller 11 and the voltage of the voltage sampling point 16, the response time of the braking action of the elevator 1000 brake 200 can be shortened and the safety of the elevator 1000 operation can be improved.

[0075] Optionally, please refer to Figure 7 The driver 29 can be connected to the first controller 11; and / or the driver 29 can be connected to the second controller 28; and / or the driver 29 can be connected to a preset voltage sampling point 16.

[0076] Specifically, the driver 29 in the second module can be connected to the first controller 11, and the driver 29 can control the second switch 26 to turn on and off according to the control information of the first controller 11; and / or the driver 29 can be connected to the second controller 28, and the driver 29 can control the second switch 26 to turn on and off according to the control information of the second controller 28; and / or the driver 29 can be connected to the voltage sampling point 16, and the driver 29 can control the second switch 26 to turn on and off according to the voltage of the voltage sampling point 16.

[0077] Please see Figure 8In some embodiments, multiple brakes 200 are connected to a first controller 11, which is configured to acquire the braking state of the multiple brakes 200 and control the output voltage of the power supply in the elevator 1000 according to the braking state.

[0078] Specifically, the elevator 1000 has multiple brakes 200, specifically two or more. All brakes 200 are connected to the first controller 11 via a bus. The first controller 11 can acquire the braking status of the multiple brakes 200, which are either braking or not braking. Based on the braking status of the brakes 200, the first controller 11 can control the output voltage of the power supply in the elevator 1000. For example, when a brake 200 transitions from braking to not braking, the power supply in the elevator 1000 uses a starting voltage of 110V; subsequently, when the brake 200 is in the not braking state, the power supply in the elevator 1000 uses a sustaining voltage of 80V.

[0079] Optionally, the first controller 11 controls the power supply in the second control module 20 by issuing a first control signal. At this time, the first control module 10 can determine the braking state of the elevator 1000 brake 200. If the braking state of the brake 200 does not conform to the braking state corresponding to the first control signal, a prompt message is issued. Alternatively, if the braking state of the brake 200 does not conform to the braking state corresponding to the first control signal, the first controller 11 further controls the power supply in the elevator 1000. For example, the first controller 11 controls the first switch 15 to open and the first controller 11 controls the second switch 26 to open.

[0080] Thus, by controlling the output voltage of the power supply in the elevator 1000 according to the braking state, the first controller 11 can form a closed-loop control of the voltage switching of the power supply in the elevator 1000.

[0081] Please refer to it again. Figure 2 and Figure 3 In some embodiments, the control device 100 further includes a third control module 30, through which the first controller 11 is connected to the car 300 of the elevator 1000. The third control module 30 is configured to control the operation of the car 300 according to a second control signal issued by the first controller 11.

[0082] Specifically, the control device 100 includes a third control module 30, which can be the drive inverter, safety torque off (STO), or main contactor of the elevator 1000. The first controller 11 can be connected to the car 300 of the elevator 1000 through the third control module 30. The third control module 30 can control the operation of the car 300 according to the second control signal issued by the first controller 11. For example, the first switch 15, the first power relay 12, and the second power relay 13 are turned on according to the second control signal issued by the first controller 11, so that the power supply in the elevator 1000 inputs current to the control line 27. The control line 27 transmits current to the brake 200, so that the brake 200 is energized. The first controller 11 obtains the braking state of the brake 200 and uses the bus to enable the third control module 30 to control the operation of the car 300 according to the second control signal issued by the first controller 11.

[0083] Please see Figure 8 In some embodiments, the first control module 10 includes a third switch 17 connected to the second power relay 13 and the third control module 30. The third switch 17 is configured to control the operation of the car 300 according to the on / off state of the second power relay 13.

[0084] Specifically, the first control module 10 includes a third switch 17, which can be a logic control unit of the elevator 1000, such as the Q2 logic control unit, or it can be a diode or transistor. The third switch 17 can connect the second power relay 13 and the third control module 30, and the third switch 17 is configured to control the operation of the car 300 according to the on / off state of the second power relay 13.

[0085] In this way, the third control module 30 can control the operation of the car 300 according to the on / off state of the second power relay 13, which can shorten the response time of the braking action of the elevator 1000 brake 200 and improve the safety of the elevator 1000 operation.

[0086] Please see Figure 9 In some embodiments, the safety circuit 14 includes one or more fourth switches 141 connected in series, and the safety circuit 14 is disconnected when any of the fourth switches 141 is disconnected.

[0087] Specifically, the safety circuit 14 includes a fourth switching element 141, which can be a diode, transistor, etc. The number of fourth switching elements 141 can be multiple, and is not limited here. Multiple fourth switching elements 141 are connected in series in the safety circuit 14, that is, if any one of the multiple fourth switching elements 141 is turned off, the safety circuit 14 will also be turned off.

[0088] Thus, by connecting one or more fourth switches 141 in series in the safety circuit 14, the safety circuit 14 can be directly disconnected when the elevator 1000 malfunctions, shortening the response time of the brake 200 to issue a braking action.

[0089] Please refer to it again. Figure 1 , Figure 2 and Figure 3 An elevator 1000 according to one embodiment of this application includes a brake power supply 400, a car 300, a brake 200, and a control device 100. The brake 200 is used to brake the car 300. The control device 100 includes a first control module 10, which includes a first controller 11, a first power relay 12, and a second power relay 13. The first power relay 12 and the second power relay 13 are connected in series in the circuit of the brake power supply 400 and the brake 200. The first controller 11 is electrically connected to the first power relay 12 and the second power relay 13 respectively. The first controller 11 is configured to control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13. For simplicity, further details are omitted here.

[0090] Please see Figure 1 , Figure 2 and Figure 3 One embodiment of the control method of this application is applied to an elevator 1000. The elevator 1000 includes a brake power supply 400, a brake 200, and a control device 100. The control device 100 includes a first control module 10, which includes a first power relay 12 and a second power relay 13. The first power relay 12 and the second power relay 13 are connected in series in the circuit between the brake power supply 400 and the brake 200. The control method includes acquiring the on / off state of the first power relay 12 and the second power relay 13; and controlling the brake power supply 400 to supply power to the brake 200 according to the on / off state.

[0091] Specifically, the control method obtains the on / off state of the first power relay 12 and the second power relay 13 through the first controller 11; and the first controller 11 can control the brake power supply 400 to supply power to the brake 200 according to the on / off state, so that the control method can realize the braking and release of the brake 200 through the first controller 11.

[0092] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0094] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control device for an elevator, characterized in that, The elevator includes a brake power supply and a brake, the brake power supply being electrically connected to the brake for supplying power to the brake, and the control device including: The first control module includes a first controller, a first power relay, and a second power relay. The first power relay and the second power relay are connected in series in the circuit between the brake power supply and the brake. The first controller is electrically connected to the first power relay and the second power relay respectively. The first controller is configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

2. The control device according to claim 1, characterized in that, The first control module also includes an optocoupler isolation circuit, a first contact status monitoring circuit, and a second contact status monitoring circuit.

3. The control device according to claim 1, characterized in that, The control device includes a second control module, which includes an optocoupler isolation circuit, a first contact status monitoring circuit, a second contact status monitoring circuit, and a detection power supply. The optocoupler isolation circuit and the first contact status monitoring circuit are connected in series, and the first power relay is electrically connected to the first controller through the optocoupler isolation circuit and the first contact status monitoring circuit. The detection power supply is used to supply power to the second power relay, and the second power relay is electrically connected to the first controller through the second contact status monitoring circuit.

4. The control device according to claim 3, characterized in that, The first power relay includes a first contact and a second contact, and the first contact and the second contact are connected to the first controller through the optocoupler isolation circuit and the first contact status monitoring circuit; The second power relay includes a third contact and a fourth contact. The detection power supply is electrically connected to the third contact and the fourth contact to supply power to the third contact and the fourth contact. The third contact and the fourth contact are connected to the first controller through the second contact status monitoring circuit.

5. The control device according to claim 3, characterized in that, The second control module includes a converter electrically connected to the brake power supply for converting the AC power of the brake power supply into DC power. The first power relay and the second power relay are configured on the AC side of the converter or on the DC side of the converter.

6. The control device according to claim 1, characterized in that, The first control module further includes a safety circuit and a first switch. The safety circuit, the first switch, the first power relay, and the second power relay are connected in series. The first controller is connected to the first switch and is configured to control the first switch to be turned on or off. When the first switch or the safety circuit is off, the first power relay and the second power relay are off. When both the first switch and the safety circuit are on, the first power relay and the second power relay are on.

7. The control device according to claim 6, characterized in that, The first controller is connected to a preset voltage sampling point in the first control module. When the safety circuit is disconnected, the voltage of the voltage sampling point is a first preset voltage. When the safety circuit is on, the voltage at the voltage sampling point is a second preset voltage, which is greater than the first preset voltage. The first controller is configured to acquire the voltage at the voltage sampling point and, when the voltage at the voltage sampling point is a first preset voltage, control the brake to apply the brakes.

8. The control device according to claim 3, characterized in that, The second control module further includes multiple second switches and multiple control lines. The multiple control lines are used to connect the brake power supply and the brake. Each second switch is located in each of the control lines. The second switch is configured to control the conduction or disconnection of the corresponding control line. The first controller is configured to control the conduction or disconnection of the multiple second switches.

9. The control device according to claim 8, characterized in that, The second switching device is a diode or a transistor.

10. The control device according to claim 8, characterized in that, The plurality of second switches are connected to the first controller.

11. The control device according to claim 8, characterized in that, The second control module further includes a second controller, and the plurality of second switches are connected to the first controller through the second controller. The second controller is configured to control the plurality of second switches to be turned on or off upon receiving a first control signal from the first controller.

12. The control device according to claim 8, characterized in that, The plurality of second switches are connected to preset voltage sampling points in the first control module. When the voltage at the voltage sampling point is a first preset voltage, one or more of the plurality of second switches are disconnected. When the voltage at the voltage sampling point is a second preset voltage, one or more of the plurality of second switching devices are turned on, and the second preset voltage is greater than the first preset voltage.

13. The control device according to claim 8 or 11, characterized in that, The second control module includes a driver connected to all of the plurality of second switches, the driver being configured to control one or more of the plurality of second switches to be turned on or off.

14. The control device according to claim 13, characterized in that, The driver is connected to both the preset voltage sampling point of the first control module and the first controller. The driver is configured to control one or more of the plurality of second switches to be turned on or off according to the first control signal of the first controller and / or the voltage of the voltage sampling point.

15. The control device according to claim 1, characterized in that, The plurality of brakes are all connected to the first controller, which is configured to acquire the braking status of the plurality of brakes and control the output voltage of the brake power supply according to the braking status.

16. The control device according to claim 1, characterized in that, The control device includes a third control module, and the first controller is connected to the elevator car through the third control module. The third control module is configured to control the operation of the car according to a second control signal issued by the first controller.

17. The control device according to claim 16, characterized in that, The first control module includes a third switch, which is connected to the second power relay and the third control module. The third switch is configured to control the car operation according to the on / off state of the second power relay.

18. The control device according to claim 6, characterized in that, The safety circuit includes one or more fourth switches connected in series, and the safety circuit is disconnected when any of the fourth switches is turned off.

19. An elevator, characterized in that, It includes a brake power supply, a car, a brake, and a control device as described in any one of claims 1-18, wherein the brake is used to brake the car.

20. A control method, characterized in that, Applied to elevators, the elevator includes a brake power supply, a brake, and control equipment. The control equipment includes a first control module, which includes a first power relay and a second power relay. The first power relay and the second power relay are connected in series in the circuit between the brake power supply and the brake. The control method includes: Obtain the on / off state of the first power relay and the second power relay; The power supply of the holding brake is controlled to supply power to the brake according to the on / off state.

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